AMD Instinct MI325X vs AMD Ryzen Z1 Extreme GPU Comparison

The Verdict

The AMD Instinct MI325X and the AMD Ryzen Z1 Extreme GPU occupy opposite ends of the AMD product spectrum. The MI325X is a 1000 W data center accelerator built for massive parallel compute, while the Z1 Extreme is a 30 W integrated graphics solution for handheld consoles. The database shows the MI325X delivers 81.72 TFLOPS of FP32 performance, roughly 9.85 times the 8.294 TFLOPS of the Z1 Extreme. The MI325X also offers 256 GB of HBM3e memory with 6.14 TB/s bandwidth, versus 16 GB of LPDDR5 at 51.20 GB/s for the Z1 Extreme. The MI325X is for server racks and AI training clusters. The Z1 Extreme is for portable gaming devices. Anyone choosing between them already knows which category they need; the data simply confirms the scale of the gap.

Architecture Differences

The MI325X uses the CDNA 3.0 architecture on the Aqua Vanjaram chip, built on a 5 nm process at TSMC with 153,000 million transistors on a 1017 mm² die. The Z1 Extreme uses RDNA 3.0 on the Phoenix chip, built on a 4 nm process at TSMC with 25,390 million transistors on a 178 mm² die. The transistor density is similar, 150.4M per mm² for the MI325X versus 142.6M per mm² for the Z1 Extreme, but the MI325X packs roughly six times the total transistor count. The MI325X has 19,456 shading units, 1,216 TMUs, and no ROPs, which explains its 0 MPixel/s pixel rate. The Z1 Extreme has 768 shading units, 48 TMUs, 32 ROPs, and 12 ray tracing cores. The Z1 Extreme supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the MI325X reports no graphics API support at all. The MI325X has no display outputs; the Z1 Extreme provides 1x USB Type-C. The MI325X uses an OAM Module slot with no power connectors and requires a 1400 W suggested PSU. The Z1 Extreme has no slot width, no bus interface listed, and no suggested PSU, fitting the 280 mm length, 111 mm height, and 21 mm width of a handheld board.

FAQ

Q: Which GPU has more memory bandwidth?

A: The MI325X has 6.14 TB/s of bandwidth from 256 GB of HBM3e on an 8192 bit bus. The Z1 Extreme has 51.20 GB/s from 16 GB of LPDDR5 on a 64 bit bus. The MI325X offers roughly 120 times the bandwidth.

Q: Does the Z1 Extreme support ray tracing?

A: Yes, the Z1 Extreme includes 12 ray tracing cores. The MI325X lists no ray tracing cores.

Q: Which GPU has a higher boost clock?

A: The Z1 Extreme boosts to 2700 MHz, while the MI325X boosts to 2100 MHz. The Z1 Extreme also has a lower base clock at 800 MHz versus 1000 MHz for the MI325X.

Q: What is the power requirement for each?

A: The MI325X has a TDP of 1000 W and a suggested PSU of 1400 W. The Z1 Extreme has a TDP of 30 W and no suggested PSU listed.

Q: Can either GPU be used for standard desktop graphics output?

A: No. The MI325X has no display outputs. The Z1 Extreme has a single USB Type-C output, which is not a conventional multi-display desktop setup.

Q: What is the release timeline?

A: The Z1 Extreme was released on 2023-06-12 with a launch MSRP of 699 USD. The MI325X was released on 2024-10-09.

Specification Differences

| Specification | AMD Instinct MI325X | AMD Ryzen Z1 Extreme GPU |

|---|---|---|

| Architecture | CDNA 3.0 | RDNA 3.0 |

| Process Node | 5 nm | 4 nm |

| Transistors | 153,000 million | 25,390 million |

| Die Size | 1017 mm² | 178 mm² |

| Transistor Density | 150.4M / mm² | 142.6M / mm² |

| Base Clock | 1000 MHz | 800 MHz |

| Boost Clock | 2100 MHz | 2700 MHz |

| Memory Clock | 1500 MHz, 6 Gbps effective | 800 MHz, 6.4 Gbps effective |

| Memory Size | 256 GB | 16 GB |

| Memory Type | HBM3e | LPDDR5 |

| Memory Bus Width | 8192 bit | 64 bit |

| Memory Bandwidth | 6.14 TB/s | 51.20 GB/s |

| Shading Units | 19,456 | 768 |

| TMUs | 1,216 | 48 |

| ROPs | 0 | 32 |

| Ray Tracing Cores | None | 12 |

| Pixel Rate | 0 MPixel/s | 86.40 GPixel/s |

| Texture Rate | 2,553.6 GTexel/s | 129.6 GTexel/s |

| FP32 Performance | 81.72 TFLOPS | 8.294 TFLOPS |

| FP16 Performance | 81.72 TFLOPS (1:1) | 16.59 TFLOPS (2:1) |

| TDP | 1000 W | 30 W |

| Bus Interface | PCIe 5.0 x16 | None |

| Display Outputs | No outputs | 1x USB Type-C |

| DirectX Support | N/A | 12 Ultimate (12_2) |

| OpenGL Support | N/A | 4.6 |

| Vulkan Support | N/A | 1.4 |

| Release Date | 2024-10-09 | 2023-06-12 |

Head-to-Head Benchmarks

The database lists no direct head-to-head benchmark entries for these two products, so the comparison relies on their recorded specification-level performance metrics. The most decisive difference is FP32 throughput. The MI325X delivers 81.72 TFLOPS, which is 73.43 TFLOPS higher than the Z1 Extreme's 8.294 TFLOPS. In relative terms, the MI325X is about 9.85 times faster for general compute. FP16 performance tells a different story in ratio: the MI325X maintains 81.72 TFLOPS at 1:1 ratio, while the Z1 Extreme reaches 16.59 TFLOPS at a 2:1 ratio. The MI325X still leads, but the Z1 Extreme's FP16 rate is exactly double its FP32 rate, indicating a different throughput strategy.

Texture work shows the same massive gap. The MI325X achieves 2,553.6 GTexel/s with its 1,216 TMUs. The Z1 Extreme produces 129.6 GTexel/s from 48 TMUs. The MI325X is roughly 19.7 times faster in texture fill rate. Pixel rate is the one category where the Z1 Extreme wins outright, as the MI325X reports 0 MPixel/s due to having no ROPs. The Z1 Extreme renders 86.40 GPixel/s. This is expected: the MI325X is not designed for rasterization output, while the Z1 Extreme handles standard graphics pipeline work.

Memory bandwidth is another dominant MI325X advantage. The HBM3e stack provides 6.14 TB/s, which is 6,088.8 GB/s more than the Z1 Extreme's 51.20 GB/s LPDDR5. The MI325X also uses an 8192 bit bus, 128 times wider than the Z1 Extreme's 64 bit bus. Memory capacity follows the same pattern: 256 GB versus 16 GB, a 16-fold difference.

Clock speeds are the only area where the Z1 Extreme leads. Its boost clock of 2700 MHz exceeds the MI325X's 2100 MHz by 600 MHz. The Z1 Extreme also has a faster effective memory clock of 6.4 Gbps versus 6 Gbps, despite running at a lower 800 MHz base memory clock. The MI325X's base core clock is higher at 1000 MHz versus 800 MHz, but the Z1 Extreme's higher boost and effective memory speed reflect its design for latency-sensitive interactive workloads.

Where Each One Wins

The MI325X wins in raw compute throughput, memory capacity, memory bandwidth, texture rate, and transistor scale. It is the clear choice for FP32 and FP16 math, with 81.72 TFLOPS in both modes. The 256 GB HBM3e pool and 6.14 TB/s bandwidth suit datasets that would never fit in the Z1 Extreme's 16 GB. The 1,216 TMUs and 2,553.6 GTexel/s texture rate serve compute-heavy shader workloads. The 153,000 million transistors and 1017 mm² die show the physical investment in parallel processing. The 1000 W TDP and 1400 W suggested PSU indicate the power delivery needed for sustained server operation. The PCIe 5.0 x16 interface is the modern host connection. The MI325X does not render pixels, has no display outputs, and supports no graphics APIs, so it is useless for direct display tasks. Its 0 MPixel/s pixel rate confirms this.

The Z1 Extreme wins in portability, efficiency, and graphics pipeline features. Its 30 W TDP is 33 times lower than the MI325X's 1000 W. The 4 nm process node is one step ahead of the MI325X's 5 nm node. The Z1 Extreme has 32 ROPs and an 86.40 GPixel/s pixel rate, which the MI325X cannot match. The 12 ray tracing cores provide hardware acceleration that the MI325X does not list. The Z1 Extreme supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, making it a functional graphics processor. Its 2700 MHz boost clock is 600 MHz higher than the MI325X, and its 6.4 Gbps effective memory clock is faster as well. The 16 GB LPDDR5 memory, while tiny compared to the MI325X, is adequate for console-class workloads. The single USB Type-C display output gives it at least one video path. The 280 mm length, 111 mm height, and 21 mm width define a compact physical footprint. The 699 USD launch MSRP was recorded on release, though pricing considerations are separate from performance analysis.

The database assigns both products a 50th percentile rating versus all GPUs, but that percentile is based on zero recorded benchmark scores and zero nearest rivals for both. The actual performance separation is enormous: nearly 10 times in FP32, 16 times in memory capacity, 120 times in memory bandwidth, and 19.7 times in texture rate. The Z1 Extreme counters with exclusive pixel rendering, ray tracing, and graphics API support, plus a 33 times lower power draw. Neither product can substitute for the other. The MI325X is a compute accelerator with no display path. The Z1 Extreme is an integrated GPU with a complete graphics stack. The selection depends entirely on whether the workload is data center compute or portable graphics.